This is the 297th most frequent Czech word.
práci
"Práci" means "work" or "job" in English (accusative or dative singular of "práce").
The word 'práce' here is used to mean 'work' or 'job', referring to one's occupation or place of employment.
Každé ráno chodím do práce.
Every morning I go to work.
The word 'práci' refers to a written academic task or paper that is being prepared.
Píšu seminární práci o ekologii.
I am writing a seminar paper on ecology.
In this sentence, 'prací' describes house chores or domestic tasks.